Spraying device



May 8, 1928.

1,669,282 I. w. P. BUCHANAN SPRAYING DEVICE le p il s. 192? 2 Sheets-Sheet. 1

JIM-All,"

May s, 1928.

1,669,282 I. w P. BUCHANAN 1 SPRAYING DEVICE Filed April 8. 1927' a ezgm ATTOR N EY Patented Mar s 'EQZE.

MW i kl e ISAAC W. P. BU'GKAWAN, 01E lilili liliiml l', TENS EYEKSTING EEVICIE.

Application tiles April 8, sextet ltlimtit'i.

This invention relates to a spray iieviee which is especially designed for use in loo quer pointing, but which, of course, can be usccl for other purposes, the general object of the invention being to provide a large compression chamber for receiving sir from a pump and having means Wl'iereby a Wide iouth container can be ettscheti thereto with eiluct'ioii tube and liquid tube associated With the chamber, the liquid tube passing through the eoluctiou tube and the chember and depending into the container anti the eductiioii tube having an adjustable nozzle or tip thereon.

Another objectof the ini entioii is to pro-- vii'le a detachable cap for the chamber with which is connected the pump and the ctiuo tioii tube as well is the. liquid tube, so that these parts can be detached from the chember by removing the cap.

Another object of the invention is to make the opening in the compression chamber, through which the liquid tube passes, but slightly larger than the tube so that the com tents of the container cannot pass into the chamber through seiol opening when the ports ore in operable position.

Another object of the invention is to pro ride supporting legs for the chamber which extenii below the container emit act, with theheiitlle of the pump, to support the device on a surface in upright position to allow on liquid. which mightget into the compression chember to drain back into the liquici container.

This invention also consists in certain other features of construction and in the combination anti srreugement of the several parts, to be hereinafter fully (iescribed, illustrated in the accompanying drawings our} specifically pointed out in the appended claims. i

in describing my invention in detail, ref

, erence will be bad to the accompanying drawings wherein like characters denote like or corresponding parts throughout the severol views, end: in which:

Figure l. is en elevation of the clevice, showing the some resting on a fiat surface.

Figure 2 is an enlarged sectional View with ports in elevation, with tlie'msjor portion oi the pump omitted.

Figure 3 is s bottom plan View.

Figure 4' on euisrgeti, lougi u iiuei sec tioiuil View through the etiuetioii tube tlie liquid tube and the nozzle. I

F gure is :i view of container which may be used rs'ith the dev es In these views, it .illt.tiif5 s container which forms on e l {i COIiiiJi'ESlOD her and which. is proi Mletl with heels; 2 ivt-iicli is threaded to receive the threzulcel port oi a cap 3, said cap being provided w. l f i which carries e threaded top to receive on extra, tip 5. 'llhe proviclcd with pair of tlireailetl bol in which are arranged of, osi thereoii. the rear hole receiving curl oi it tube 6 of an air liurru being jfiro'vicletl with :i check 'fIOliiZ-iiflifi receiving the tin etiuctioii tube 9.

A liquid tube 10 is bent metal part seal it rerticel port tel pert passing through the silt anti the vertical port estcntliog tor cap anol through the chamber and t hole 11 formed in the bottom of the chsmoer, the lower end of'tlie vertical pert exteiiiiiir at considerable distance below the bottom oi the chamber. This tube it) is firmly heltl iii place by screwing the ecluctioii time for enough into the dome of the cap to'ttforce the bend. in the tube 16 against.- the rear well of the (ionic and cap so that the tube is rigidly SillTiPOltQCl between the etiti of the tube and the rear wall of the cop, e116. it clesireti, the tube 16 can be soldered to tlie cap. it is further sup iortetl against movement by e. screen 12 pleceil iii the cap under the dome sud having a hole therein through which the tube 10 passes. This screen also sets to prevent flames from. passing through the etiuctioii tube and the cop into the chamber, "when the device is used. as 21 frame producer. The tube 10 is still further supporteii; and it is also centered in the eduction tube 9, three b means of the depressions 13 muscle is t e outer end of the educt-ioo tube eml engaging tube 10.

The outer curl of the reduction tribe threaded, as at 14, to receive the nozzle or trig) 15 so that said tip can be etl ius'ted on the ctluct-ion tube anti the tip is lockecl is. ediusb es position by means of the loci: out. 16 threaded on the eduetion tube a. we 1'2 Eli! incense g nrrengcd between the tip and lock nut a liquid and airtight joint. 1 preio recess the lock nut, shown at 1.8, to

e e portion. of the washer.

1 The outer end of the tube projects beyond the outer end of the cduction tube, and said tube 10 has a flaring or conical mouth 19. This mouth causes the stream to spread out, thereby allowing the di? to more readily in atomize the liquid, which insures the breaking' up of the liquid in minute particles, which results in a perfect sprey free of drops. By adjusting the ti on the cduction tube, the spray can be madefine or coarse, is as will be understood, end by turning the tip until its interior wall strikes the mouth of the tube 10, air will be prevented from escoping through the eduction tube so that a solid stream of liquid will pass from the tip.

29 The lock nut insures the tip remain'in in the position to which it has been adjusts A threaded flange depends from the bottom of the chamber 1 and is adapted to receive'the threaded neck of a wide mouth $5 container 21 which isto contain the materisl to be sprayed. As shown, the tube 10 depends into the container so that when air is forced into the chamber by the operation of the pump, some of this air will pass through the opening 11 and place the u0ntents of the container under pressure and thus force said contents through the tube 10. Some of the air from the pump will pass through the eduction tube 9 so that the air and liquid will pass from the tip and thus produce a spray, the density of which is controlled by adjustment of the tip. As before stated, if the tip is adjusted until it rests against the tube 10,21. solid stream of liquid will be ejected from the device.

As stated! above, by making the hole 11 slightly larger than the tube 10, air can pass from the chamber into the container with out much danger of the contents of the container getting into the chamber through tilting of the device. a

By making the container with a wide mouth, lacquer and other thick liquids can be easily placed therein and the container can be easily cleaned. This will permit lacquers of different colors to be used in the device, as the cr itairg-r can be easily cleaned to remove traces of lacquer of one color so that a lacquer of another color can be placed therein.

I provide containers of different sizes so that when a small job of painting is to be done, a container of small size can be attached to the device, as shown in Figure 1,

but when a larger job is to be done, e container of larger size is attached to the device, as shown in Figure 2. Figure 5 shows the form of container also shown in Figure 2. While the bodies oi the containers are of different sizes, their mouths or necks are of the some size so tlist they will engage the flange 20, and the containers should be of the same height so that they will not come below the ends of the legs 22 which are preferably connected together by a loop 23 which cmbracesthe flange, the legs and loop being formed of spring metal so that the leg forming member will frictionally engage the flange. When the device-is at rest, the handle of the pump forms one of the sup porting points, as shown in Figure 1, so that but two legs are necessary.

As shown in Figure'l, these legs and the handle support the device ,iusubstcntiall upright position so that substantially al accumulated liquid in the compression chamber will drain back into the liquid container through the openin around the liquid tube in the bottom of t e compression chamber if liquid should get into the compression chamber from the liquid in the container through improper handling of the device.

In order to prevent the escape of material from the nozzle or tip when ever desired, I provide a lever 24 which is pivoted in the forked end of an upright 25,. which is clamped to the cduction tube and has its forward end bent downwardly and provided with a pad 26 so that when the lever is tilted, this pad will cover the hole in the tip and thus prevent the escape of material therefrom. A spring 27 is attached to the lever and'to the eduction tube and acts to hold the lever .in raised position with the pad out of engagement with the nozzle or tip. The lever is provided with a finger piece 28 so that it can be tilted by the open ator whenever he desires to cut off the ow of liquid from the nozzle while the compression chamber still contains air.

A depending match holder 29 is carried by the eduction tube for holding a match adjacent the nozzle so that the spray will be ignited by the flame of the match when the device contains an inflammable 1i uid. In this case, the device is useful for ma ing fires and sterilizing objects, etc.

.The tip 5 may have a different sized opening from the t1 15 so that the tips can be interchanged w ienever desired.

Gaskets 30 are placed in the cap and in the flange 20 to form tight-joints at these points.

As before stated, this device is mainly intended for spraying lacquer paint on ob jects. With this lacquer paint, it is desirable to have a wide mouth container so that the paint-can be easily placed therein and the container cleaned, and as the container is of comparatively small size, it is necessary to havean air chamber to receive the compressed air which ls used to force the material from the device in, a continuous spray. The compression chamber must be large proper operation of the device.

enough in comparison to the rate of liquid discharge to produce a perfectly continuous 21 ray during the reciprocations of the pump. l t is also necessary, in devices of this nature, to have the tube 10 firmly supported and its outer end centered in the eduction tube, and I do this by the means above described. By having the parts of the sprayer carried by the cap, they will be removed when the cap is removed, so that they can be easily cleaned, it necessary.

By providing the container 1 for forming a separate compression chamber, a large air space is provided which is entirely distinct from the container holding the material to be sprayed and, therefore, there is no danger of restricting this compression chamber as there is when the compression chamber is contained in the liquid container, by placing too much liquid in the same. in spite of iii-- structions to the contrary, users of these devices will often place so much material in the container as to so reduce the compressed air space as to seriously interfere with the By provid' ing this large compression chamber, the pump can be worked slowly as there will be an ample amount of air in the chamber to operate the device under a slow movement of the pump. This large compression chamber also prevents clogging of the spray parts by the material being sprayed, for if the device is held at such an angle that some of the material will pass into the compression chamber, though very little can pass into this chamber through the opening 11, due to the vacuum in the container 21, this material could not pass into the sprayer head unless the container 1 was filled more than half full while the device was lying on its side and, of course, this would never occur. l Vhen the device is placed in an upright position again, what little material had entered the chamber 1 would run back into the container 21.

In small work and in decorative operations, it is of the highest importance that an operator may have the advantage of a small, wide-mouth container of from four to ten ounces. This is true both because oi the expensive material used and also because it is desirable to have two or more of these small containers available with diflierent colored lacquers, paints, etc, in them. It is quite a serious matter to be compelled to stain and then clean large containers, when the small ones would answer much better.

Now, the small container cannot be used except in connection With a separate compression chamber of at least ten ounces capacity, provided we expect to get reason ably continuous operati0n,which, of course, is necessary for any worlr'that is at all satisfactory.

The expense and inconvenience in filling large containers with small quantities of expensive materials is a very important matter.

Another-advantage of this type of sprayer with separate compression and liquid chamhers is that a larger mouth can be used for convenience in filling, cleaning, etc.

Since the pressure in ordinary spraying is from ten to twenty pounds to the square inch, the head mechanism of this type of sprayer is too delicate to withstand the strain necessary to force a wide-mouth container against its washer closely enough to stop the escape of air. These parts are necessarily delicate both on account of the nature of their functioning and the expense of their construction. Whereas, in the case of a separate compression chamber and separate liquid chamber, the Wide mouth can be forced against this washer by grasping the compression chamber in one hand and the liquid chamber in the other.

It will be understood that the above advantages apply to the device when the same is used. with ordinary paint or with any other material.

It will also be understood that the cap can be removed from the expansion chamber and placed on a narrow neck container for use with spray material and the like. When so used, the upper part of the container forms the expansion chamber, for producing a continuous spray, and an expansion chamber, such. as indicated at 1, is not necessary.

It is thought from the foregoin description that the advantages and novdl features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is 1. A spraying device comprising a con tainer forming a compression chamber and having an opening in its bottom, a threaded flange depending from the bottom of the container and surrounding the opening, a container having a threaded neck for engaging the threaded flange, the first container having a threaded neck, a cap having a threaded part for engaging the neck, an, air pump connected with the cap and communicating therethrougb with the chamber for introducing air into the chamber, an eduction tube carried by the cap, a nozzle adjustable on the outer end of the tube, a liquid tube having a part centrally arranged in the eduction tube and another part extending through the first container and through the opening in the bottom thereof into the second container, the opening being slightly larger than the tube.

2. Av spraying device comprising a rigid container forming a compression chamber ill) Inc

and having an opening in its bottom, a sec- 0nd container secured to said first container and communicating therewith through said opening, a reduced hollow substantially axial extension on top of the first container and in communication therewith, an air pump connected with the extension and communicating therethrough with the com pression chamber for introducing air into the chamber, an educt-ion tube carried by the extension, a nozzle on the outer end of the tube, a liquid tube extending from said nozzle through said eduction tube in spaced relation to the Walls of the bore thereof, thence through the extension, the first container and the opening in the bottom of the first container into the second container, the

opening being slightly larger than the tube.

3. A spraying device comprising a rigid container forming a compression chamber and having an opening in its bottom, a'sec- 0nd container secured to said first container and communicating therewith through said opening, a reduced hollow substantially axial extension on top of the first container and in communication therewith, an air pump connected with the extension and communioatin therethrough with the compression cham er for introducing air into the chamber, an eduction tube carried by the extension, a nozzle on the outer end of the tube, a liquid tube extending from said nozzle through said eduction tube in spaced relation to the Walls of the bore thereof, thence throuh the extension, the first container and t e opening in the bottom of the first container into the second container, the

4. A spraying device comprising a ri id container forming a compression cham er and having a sm'all opening in its bottom, a second container secui ed to said first con tainer and having restricted communication therewith through said opening, a reducci hollow substantially axial extension on top of the first container and in communication therewith, an air pump connected with the extension and. communicating therethrough with. the compression chamber for introducing air into the chamber, an eduction tube carried by the extension, anozzle on the outer end of the tube, and a liquiiT'delivery tnbe arranged to establish communication between said nozzle and the interior 01 said second container near the bottom thereof.

In testimony whereof I aifix my signature.

ISAAC W. P. B'UGHNAN. 

